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參數(shù)資料
| 型號(hào)： | TPS2066DG4R |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | PLASTIC, SO-8 |
| 文件頁數(shù)： | 16/35頁 |
| 文件大?。?/td> | 821K |
| 代理商： | TPS2066DG4R |
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Current Sense
Thermal Sense
Undervoltage Lockout
SLVS490D – DECEMBER 2003 – REVISED FEBRUARY 2007
DETAILED DESCRIPTION (continued)
A sense FET monitors the current supplied to the load. The sense FET measures current more efficiently than
conventional resistance methods. When an overload or short circuit is encountered, the current-sense circuitry
sends a control signal to the driver. The driver in turn reduces the gate voltage and drives the power FET into its
saturation region, which switches the output into a constant-current mode and holds the current constant while
varying the voltage on the load.
The TPS206x implements a thermal sensing to monitor the operating temperature of the power distribution
switch. In an overcurrent or short-circuit condition the junction temperature rises. When the die temperature rises
to approximately 140
°C due to overcurrent conditions, the internal thermal sense circuitry turns off the switch,
thus preventing the device from damage. Hysteresis is built into the thermal sense, and after the device has
cooled approximately 10 degrees, the switch turns back on. The switch continues to cycle off and on until the
fault is removed. The open-drain false reporting output (OCx) is asserted (active low) when an overtemperature
shutdown or overcurrent occurs.
A voltage sense circuit monitors the input voltage. When the input voltage is below approximately 2 V, a control
signal turns off the power switch.
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| TPS2066DGN | 功能描述:電源開關(guān) IC - USB Dual 1A Current-Limited RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2066DGN-1 | 功能描述:電源開關(guān) IC - USB Crnt-Ltd Pwr-Dist Sw RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2066DGN-1G4 | 功能描述:電源開關(guān) IC - USB Crnt-Ltd Pwr-Dist Sw RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2066DGNG4 | 功能描述:電源開關(guān) IC - USB Dual 1A Current-Limited RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2066DGNR | 功能描述:電源開關(guān) IC - USB Dual 1A Current-Limited RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
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